Operating rod



I T. N. BOURKE.

I OPERATING ROD. I

APPLICATION'HLED OCT. 1,1921.

Patented Dee. 5,1922.-

A TTORNE Y.

- Patented DeeJS, 1922.- I

UNITED 1,438,016 PAT FFICE.

THOMAS N. BouRxE, or DETROIT, MICHIGAN, n'ssIGuoRTo' snaimaxER ELECTRICWELDING COMPANY, or DETRoIT, MICHIGAN, A CoRPoRA Ionp MICHIGAN.

OPERATING ROD.

Application filed October 1, 1921. Serial No. 504,729.

To all whom it my concern:

Be it known that I, THOMAS N. BO RKE, a citizen of the United States,residing at Detroit, in the county of Wayne and State of Michigan, haveinvented certain new and useful Improvements in Operating Rods, of

. movement with respect to the outer member which the following is aspecification.

This invention relates to operating rods for ventilators, or similarmembers, and has for its object a composite push rod member in which theinner member has a limited to act as a releasing'cam to disengage therestraining dog. The result is that this rod may be operated from oneend and absolutely lock against any actuating from the opposite end.

One of its main places of usefulness 1s to 'hold a ventilator lid on anautomobile in open may the car and connected by suitable connectionswith the ventilator.

In the draw1ngs,-

Fig. 1 is a side elevation of a car equipped with the ventilator and theoperating rod.

Fig. 2 is an enlarged cross section through the instrument board andaportion of the ventilator showing the operating rod in position topull-the ventilator up or down.

Fig. 3 is a similar view showing the operating rod locked.

Fig. 4 is a cross section on the line 44 of Fig. 3.

Fig. 5 is a fragmentary perspective of the outer telescoping part of theoperating rod;

Fig. 6 shows twoelevations of the locking dog.

Fig; 7 is a fragmentary section showing how the dog notches interlock.

a designates a ventilating lid which .may be opened and closed by thelink 6 connected with the operating .rod section 0. This is the outertelescoping rod section having locking notches d to receive the'srqllliale shoulders a: of the locking dog e.

or closed position. The operating rod, be located on the instrumentboard of and the walls of the slot. 0.

erating rod in a substantially horizontal path.

This operating rod is made up of an outer telescoping section 0 which isin the form of a notched channel'bar. The inner section is'designated mand has on its inner end a knob n. The other end of the inner section.is notched at 0. A pin 7) secured in the side walls of the channelsection passes through this notch. This notchand pin gives a limitedlost motion between the two telescoping sections. The inner section hasits under side notched with a plurality of notches having sloping wallsand desig? nated g. These form cams which can engage the center ridge 3and force the looking dog 6 back outof the path of the rod operatingsections to permit the same to be operated. When the rod is locked, asshown in Fig. 3, the pin p is substantially at the. center of the slot0. Now the inner sectionm may be either pushed in or pulled out alimited distance as permitted by the pin p This is sufiicient to throwone of the sloping side walls of the notches 9 against the locking dogand release it; 7

Now obviously any effort to actuate the securely in place. On the otherhand, movement in either direction bygrasping the knob n tends first todisengage the locking dog and continued movement actuates the outertelescoping sectionc which is connected with the link b. This connectionwith the link b is an adjustable one as the] stud r telescopes in therod portion a an may be extended or contracted by loosening the setscrew 2!.

To more fully explain the operation of the locking dog. it might be wellto refer to Fig. 7. It will be seen that the notches q are deeper haveto be in their respective notches at the same time. and inasmuch as theridge or cam part is always in advance of the shoulders w, consequentlythe notches in the telescoping member-m have to be deeper.

What claimv is: 1. An operating rod, having in combination, a bearing,two sections slidable through than the notches d for the ridge. or campart of the dog and the shoulders a said bearing and arranged to have alimited sliding movement with ,respect to each other, and means forlocking one of the sections and disengageable only when a limitedmovement takes place between the sections and which limited movement canonly be initiated at one end of the two sections.

' movement between the sections which movement can be initiated only atone end of the sections.

3. An operating rod, having in combination, a bearing, a pair ofsections slidable through the bearing and having a limited slidingmovement with respect to each other, and a locking dog adapted to engageand lock one of the sections, the other section provided with means fordisengaging the locking dog when a limited relative movement is hadbetween the two sections.

4. An operating rod, having in combination, a bearing, a pair ofsections slidable through the bearing, one of the sections be ingprovided with locking notches, a locking dog adapted to engage in saidlocking notches, the other section being provided with notches havingsloping walls to form cams to disengage the locking dog, the saidsections having a limited relative movement which may be initiated atonly one end of the sections to cause the section with the cam surfacesto first disengage the locking dog before movement of the two sectionsis had.

5. An operating rod, having in combination, a bearing, a pair oftelescoping sections engagin through the bearing, one of said sectionsbeing provided with looking notches, the other of the sections beingprovided with notches having sloping walls or cam faces, the saidsections having a relative limited movement with respect to each other,and a locking dog engaging in said bearing and normally engaging in thelocking notches but disengaged from the locking notches by a limitedmovement of the cam surface section which can be initiated only from oneend of the sections.

6. An operating rod, having in combination, a bearing, a channel sectionsliding through the bearing and provided with rec tangular notches inits side Walls, the inner section slidable in said channel section andthrough the bearing and provided with notches having sloping walls, thesaid two sections having a relative limited movement with respect toeach other, and a locking dog in said bearing projected normally intothe rectangular notches of the outer section to lock the two sectionsbut capable of being withdrawn from such notches by the limited movementof the inner section with respectto the outer section, in which movementthe sloping walls of the notches of the inner section force the lockingdog out of engagement with the rectangular notches of the outer section.

7. An operatinghandle, having in combination, a bearing, a pair ofsections slidable through the bearing, one section being a channelmember notches in its side walls and having one end connecting with amember (ventilator) to be operated, an inner section slidable in thebearing and inside of the channel of the outer section and having on itsopen side a plurality of notches having sloping walls or cam faces, thesaid inner member provided with a notch and the outer member providedwith a pin which permits a limited relative movement between the twosections, and a locking dog normally engaging in some of the lockingnotches of the outer section but disengaged from such notches by thelimited relative movement of the inner section with respect to the outersection, the said cam faces of the inner section forcing the lockin dogback out of the way.

n testimony whereof I affix my signature.

THUMAS N. BOURKE.

provided with locking

